public class Example7_4 {
   public static void main(String args[]) {
      int n = 0,m = 0,t = 1000;
      try{ m = Integer.parseInt("8888");
           n = Integer.parseInt("ab89");  //发生异常，转向catch
           t = 7777; //t没有机会被赋值
      }
      catch(NumberFormatException e) {
            System.out.println("发生异常:"+e.getMessage());
      }
      System.out.println("n="+n+",m="+m+",t="+t);
      try{ System.out.println("故意抛出I/O异常！");     
           throw new java.io.IOException("我是故意的");  //故意抛出异常
            //System.out.println("这个输出语句肯定没有机会执行，必须注释，否则编译出错");
      }
      catch(java.io.IOException e) {
           System.out.println("发生异常:"+e.getMessage());
      }
   }
}
